title: Electrically driven green, olivine, and amber color nanopyramid light emitting diodes.
abstract: We report the fabrication and studies of electrically driven green, olivine, and amber color nanopyramid GaN light emitting diodes (LEDs). InGaN/GaN multiple quantum wells (MQWs) were grown on the nanopyramid semipolar facets. Compared with the commonly used (0001) c-plane MQWs, the semipolar facet has lower piezoelectric field, resulting in much faster radiative recombination efficiency. This is important for high In content MQWs. The measured internal quantum efficiencies for green, olivine, and amber color LED are 30%, 25%, and 21%, respectively. The radiative and non-radiative lifetime of the semipolar MQWs are also investigated.
authors.forename: Shih-Pang
authors.initials: SP
authors.lastname: Chang
authors.forename: Jet-Rung
authors.initials: JR
authors.lastname: Chang
authors.forename: Kuok-Pan
authors.initials: KP
authors.lastname: Sou
authors.forename: Mei-Chun
authors.initials: MC
authors.lastname: Liu
authors.forename: Yuh-Jen
authors.initials: YJ
authors.lastname: Cheng
authors.forename: Hao-Chung
authors.initials: HC
authors.lastname: Kuo
authors.forename: Chun-Yen
authors.initials: CY
authors.lastname: Chang